Amazon.com: Laptop Backpack,Business Travel Anti Theft Slim 。MATERIAL and WATERPROOF: Made of waterproof oxford 300D fabric, wearing-resisting. Adjustable shoulder straps can prevent them from slipping, and make the slim laptop backpack fit your body shape and shoulders better. LOT OF STORAGE: The laptop backpack offers a lot of storage space due to the compartments.You can put laptop,iPad, power bank,camera,books and other item you need and keep it organized.The backpack can hold up to 15.6 inch laptops USB CHARGE PORT: With built in USB charger outside and built in charging cable inside,this USB backpack offers you a more convenient way to charge your phone while walking. Please noted that this backpack doesn\'t power itself, usb charging port only offers an easy access to charge.